a = 1
print("第一次a的类型为:",type(a))

a = 1.1
print("第二次a的类型为:",type(a))

a = "xxxx"
print("第三次a的类型为:",type(a))

b:int = 10

f:float = 1.1

flag:bool = False

str:str = "xxx"
str2 = """xxxxxxx"""








